US6683746B1 - Disk drive breather filter with adsorbent layer shorter than receiving sheet aperture - Google Patents
Disk drive breather filter with adsorbent layer shorter than receiving sheet aperture Download PDFInfo
- Publication number
- US6683746B1 US6683746B1 US09/501,482 US50148200A US6683746B1 US 6683746 B1 US6683746 B1 US 6683746B1 US 50148200 A US50148200 A US 50148200A US 6683746 B1 US6683746 B1 US 6683746B1
- Authority
- US
- United States
- Prior art keywords
- sheet
- adsorbent layer
- breather filter
- filter
- aperture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
- G11B33/1446—Reducing contamination, e.g. by dust, debris
- G11B33/146—Reducing contamination, e.g. by dust, debris constructional details of filters
Definitions
- This invention relates in general to an improved data access and storage device and in particular to an improved filtration system for data access and storage devices. Still more particularly, the invention relates to an improved breather filter for low profile hard disk drives.
- the breather filter in a hard disk drive equalizes the pressure inside the HDD with the pressure outside the HDD while preventing particle contamination from entering the HDD.
- prior art breather filters have been relatively simple structures. A particle filter is typically attached to a hole in the cover of the HDD with double-sided adhesive tape.
- breather filters to better protect corrosion-sensitive components. Such components include disks with a Co-system magnetic film and MR or GMR heads formed from Ni, Fe, Co, and Mn.
- breather filters must do more than filter dust from the ambient air that enters the HDD.
- breather filters also must control air inflow, purify the air of organic or acid gases, reduce the relative humidity of the air, and perform highly efficient absorption of organic out gas within the HDD.
- these additional demands are capable of being met by providing an adsorbent material (such as active carbon or a carbonate) for the purification of the outside air (organic gas and acid gas), a diffusing tube for restricting air inflow and controlling humidity, and an additional adsorbent material (active carbon), different from the first, for efficient absorption of organic out gas in the HDD.
- an adsorbent material such as active carbon or a carbonate
- active carbon active carbon
- FIGS. 5 and 6 Two configurations of conventional breather filters for HDDs are shown in FIGS. 5 and 6.
- Each filter has a top cover 51 has a hole 52 , a plastic filter main body 53 with an internal diffusing tube 54 , and a recess 55 .
- An adsorbent material 56 such as active carbon, is located in recess 55 .
- Each filter also has a plastic flow barrier 57 for dispersing gas being passed through the adsorbent material 56 , a particle filter 58 , such as a HEPA® filter, and an adhesive agent 59 .
- the purification of the outside air by the adsorbent material 56 , the inflow restriction on the outside air, and the reduction in the humidity change by the diffusing tube 54 can be effectively attained.
- FIG. 5 the area of contacted between the adsorbent material 56 and the HDD interior is small because there is the flow barrier 57 . Therefore, the organic out gas in the HDD interior cannot be absorbed in a highly efficient manner.
- FIG. 6 the organic out gas in the HDD interior can be absorbed at high efficiency by providing a different adsorbent material 56 than the one employed in the purification of the outside air. The additional adsorbent material 56 would be placed on the exterior of the flow barrier 57 .
- the present invention relates to a breather filter that is employed in a hard disk drive (HDD) by attaching it to a hole provided in the cover of the HDD.
- the breather filter is configured by preparing a first sheet forming a diffusing tube at a position corresponding to the hole provided in the cover of the HDD, a second sheet forming an opening at a position corresponding to the diffusing tube of the first sheet, a third sheet having an adsorbent layer at a position corresponding to the opening in the second sheet, a fourth sheet comprising a filter layer covering the adsorbent layer of the third sheet.
- the breather filter is assembled by stacking the four sheets. This configuration forms a thin breather filter that can be mounted on a low profile HDD having a thickness of approximately one inch.
- the breather filter performs the same functions as conventional breather filters, such as air purification, inflow restriction, reduction in humidity change, and highly efficient absorption of organic out gas in the HDD interior, by forming the diffusing tube and the adsorbent layer in the respective sheets.
- the four sheets are preferably retained with adhesive.
- the first and third sheets may be assembled with double-sided adhesive tape.
- an adsorbent layer provided in the third sheet is equipped with an active carbon fiber containing a carbonate.
- the adsorbent layer in the third sheet is capable of covering a portion or all of the opening formed in the second sheet. Accordingly, it is an object of the present invention to provide an improved data access and storage device.
- Still another object of the present invention is to provide an improved breather filter for low profile hard disk drives.
- FIG. 1 is a sectional side view of a first embodiment of a breather filter for an HDD constructed in accordance with the invention.
- FIGS. 2 ( a )-( d ) are plan views of each sheet of the breather filter of FIG. 1 .
- FIG. 3 is a sectional side view of a second embodiment of the breather filter of FIG. 1 .
- FIGS. 4 ( a )-( d ) are plan views of each sheet of the breather filter of FIG. 3 .
- FIG. 5 is a sectional side view of a first type of prior art breather filter for an HDD.
- FIG. 6 is a sectional side view of a second type of prior art breather filter for an HDD.
- FIG. 1 is a sectional view showing a first embodiment of a breather filter for an HDD, according to the present invention.
- FIGS. 2 ( a )-( d ) are plan views showing four sheets that configure the breather filter shown in FIG. 1, respectively.
- the breather filter 1 shown in FIGS. 1 and 2 is mounted at a position corresponding to a hole 3 in the cover 2 of an HDD.
- the breather filter 1 in this embodiment is configured by stacking a first sheet 11 formed with a diffusing tube 12 at a position corresponding to the hole 3 provided in the cover 2 of the HDD, a second sheet 21 formed with an opening 22 at a position corresponding to the diffusing tube 12 of the first sheet 11 , a third sheet 31 with an adsorbent layer 32 at a position corresponding to the opening 22 of the second sheet 21 , and a fourth sheet 41 comprising a filter layer covering the adsorbent layer 32 of the third sheet 31 .
- the first sheet 11 is configured by adhesive double-coated tape.
- the first sheet 11 determines the configuration of the diffusing tube 12 , in addition to fixation of the breather filter 1 to the cover 2 of the HDD and ensuring airtightness.
- the characteristics of the diffusing tube 12 must be controlled.
- the characteristics of the diffusing tube 12 can easily be controlled by the thickness of the adhesive double-coated tape configuring the first sheet 11 and the width of the diffusing tube 12 .
- the second sheet 21 is configured by an airtight film. The second sheet 21 forms the diffusing tube 12 along with the cover 2 .
- the four sides in the depth direction of the breather filter 1 is formed with the adhesive double-coated tape, the top surface is formed with the cover 2 , and the bottom surface is formed with the second sheet 21 .
- the opening 22 in the second sheet 21 is used for guiding the outside air passed through the diffusing tube 12 to the underlying third sheet 31 .
- the third sheet 31 is configured by an adsorbent layer 32 and adhesive double-coated tape surrounding the layer 32 .
- adsorbent layer 32 a mixture of a carbonate and silica gel is employed with active carbon as a main component.
- the adsorbent layer 32 can adsorb organic gas and acid gas and can also adsorb vapor.
- the fourth sheet 41 is configured by a particle filter. The fourth sheet 41 is used to prevent particle contamination and fixed by the adhesive double-coated tape configuring the third sheet 31 . From the foregoing description it follows that the basic functions of the breather filter 1 are configured by sheets of four thin simple layers.
- the adsorbent layer 32 is exposed to the interior of the HDD through only the fourth sheet 41 configured by the particle filter, so it can adsorb the out gas produced in the interior of the HDD.
- the adsorbent layer 32 can also absorb the vapor entering the interior of the HDD and reduce a rise in the relative humidity of the HDD interior.
- these functions can be obtained without providing an additional filter. Since the aforementioned breather filter 1 of the present invention is thin, it can be practically increased in area without difficulty and it is also easy to further enhance the aforementioned adsorbing property.
- the breather filter 1 with the structure shown in FIGS. 1 and 2, the entire opening 22 in the second sheet 21 is covered with the adsorbent layer 32 of the third sheet 31 . That is, air is passed through the adsorbent layer 32 and purified. For this reason, it is preferable that the breather filter 1 in this embodiment be used when air is easily passed through the adsorbent layer 32 . Also, it is generally preferable that, as the adsorbent layer 32 , fibrous active carbon be employed in the form of cloth.
- FIG. 3 is a sectional view showing a second embodiment of the breather filter for an HDD, according to the present invention.
- FIGS. 4 ( a )-( d ) are plan views showing the four sheets that configure the breather filter shown in FIG. 3, respectively.
- the same reference numerals will be applied to the same members as those shown in FIGS. 1 and 2 for the sake of efficiency.
- the point differing from the breather filter 1 with the configuration shown in FIGS. 1 and 2 is that, by providing an adsorbent opening 33 , a portion of the opening 22 in the second sheet 21 is covered with the adsorbent layer 32 of the third sheet 31 .
- the breather filter 1 in this embodiment be used when air is not easily passed through the adsorbent layer 32 .
- the adsorbent layer 32 with the weight of active carbon increased by compressing active carbon onto the sheet is used, a rise in the humidity of the interior of the HDD can be suppressed more effectively.
- air is not easily passed through. Therefore, it is preferable that air be purified by surface diffusion, as in this embodiment.
- the breather filter 1 of the present invention was made by stacking the first sheet 11 , the second sheet 21 , the third sheet 31 , and the fourth sheet 41 shown below.
- the first sheet 11 an acrylic adhesive double-coated tape of 150 mm in thickness having a 1.5% 20 mm slit for forming the diffusing tube 12 was employed.
- the second sheet 21 the 3% 2-mm opening 22 employed a PET film of 150 mm in thickness.
- the third sheet 31 an active carbon fiber of 150 mm in thickness, combined with acrylic adhesive double-coated tape of 150 mm in thickness binding potassium carbonate in the form of 22% 4 mm, was employed.
- a PTFE membrane filter of 70 mm in thickness was employed as the fourth sheet 41 .
- the breather filter 1 thinned to a thickness of 520 mm is obtainable and the obtained breather filter 1 can be mounted interiorly of the HDD.
- conflicting characteristics i.e., a pressure loss of 9 mmH 2 O (3 ml/min) and a relative humidity time constant of 250 hours are compatible.
- the breather filter is configured by stacking the first sheet through the fourth sheets respectively comprising thin sheets.
- This configuration can attain a thin breather filter that can be mounted on a thin-type HDD such as a 1-inch-type HDD.
- the breather filter of the present invention can also attain the same functions as the conventional breather filter, such as purification of the outside air, an inflow restriction on the outside air, a reduction in a humidity change, and a high efficient absorption of organic out gas in the HDD interior, because the diffusing tube and the adsorbent layer are formed in each sheet.
- the breather filter of the present invention attains these higher functions at higher efficiency than prior art designs.
Abstract
Description
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11-033128 | 1999-02-10 | ||
JP11033128A JP2000231775A (en) | 1999-02-10 | 1999-02-10 | Breather filter for hdd |
Publications (1)
Publication Number | Publication Date |
---|---|
US6683746B1 true US6683746B1 (en) | 2004-01-27 |
Family
ID=12377985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/501,482 Expired - Fee Related US6683746B1 (en) | 1999-02-10 | 2000-02-09 | Disk drive breather filter with adsorbent layer shorter than receiving sheet aperture |
Country Status (5)
Country | Link |
---|---|
US (1) | US6683746B1 (en) |
JP (1) | JP2000231775A (en) |
KR (1) | KR100328909B1 (en) |
MY (1) | MY125096A (en) |
SG (1) | SG83764A1 (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040114273A1 (en) * | 2001-02-13 | 2004-06-17 | Takayuki Fujiwara | Ventilation path for a disk drive apparatus |
US20060032371A1 (en) * | 2004-08-13 | 2006-02-16 | Dauber Edwin G | Adsorbent breather filter |
US20060032372A1 (en) * | 2004-08-13 | 2006-02-16 | Dauber Edwin G | Grooved active and passive adsorbent filters |
US20060056106A1 (en) * | 2004-09-10 | 2006-03-16 | Hitachi Global Storage Technologies Netherlands B.V. | Moisture absorbing mechanism and magnetic disk drive |
US20060092557A1 (en) * | 2004-10-29 | 2006-05-04 | Kabushiki Kaisha Toshiba | Disk device |
WO2006084106A1 (en) * | 2005-02-03 | 2006-08-10 | Donaldson Company, Inc. | Breather filter for reduction of contaminant diffusion |
US7209319B1 (en) * | 2004-06-25 | 2007-04-24 | Western Digital Technologies, Inc. | Disk drive having a disk drive component adhered to the disk drive housing via an adhesive assembly having a leveling layer |
US20070150909A1 (en) * | 2005-12-22 | 2007-06-28 | Takayuki Fujimoto | Disc drive |
US20070289971A1 (en) * | 2006-05-09 | 2007-12-20 | Olszewski Jason R | Valve for Electronic Enclosure |
US7318859B2 (en) | 2004-10-18 | 2008-01-15 | Gore Enterprise Holdings | Modular adsorbent filters |
US20100086460A1 (en) * | 2005-11-03 | 2010-04-08 | Deeken John S | Device and method for filtering contaminants |
US20120142266A1 (en) * | 2010-12-07 | 2012-06-07 | Empire Technology Development Llc | Ventilator units, methods for providing ventilation in response to humidity levels, and wall units |
US20130044391A1 (en) * | 2011-08-17 | 2013-02-21 | Charles Allan Brown | Magnetic storage device with multi-functional component for controlling chemical and water vapor therein |
US8861127B2 (en) | 2011-08-17 | 2014-10-14 | HGST Netherlands B.V. | Magnetic storage device with dynamic humidity control system to mitigate water vapor transients |
US8867164B2 (en) | 2011-08-17 | 2014-10-21 | HGST Netherlands B.V. | Magnetic storage device with humidity control device incorporating a differentially permeable membrane |
US10388328B1 (en) | 2018-04-06 | 2019-08-20 | Seagate Technology Llc | Storage device breathing structure |
US10905991B2 (en) * | 2016-07-20 | 2021-02-02 | W. L. Gore & Associates, Inc. | Adsorbent breather for enclosure protection |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020075590A1 (en) * | 2000-12-14 | 2002-06-20 | Garikipati Vijay Kumar | Filter Construction, method of making, and method of use |
KR100640604B1 (en) | 2004-12-09 | 2006-11-01 | 삼성전자주식회사 | Flexible printed circuit and bracket structure of hard disk drive |
Citations (2)
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US5417743A (en) * | 1994-01-21 | 1995-05-23 | W. L. Gore & Associates, Inc. | Self-adhesive vent filter and adsorbent assembly with a diffusion tube |
US5997614A (en) * | 1998-07-13 | 1999-12-07 | Donaldson Company, Inc. | Filter with diffusion channel and methods of making and using the filter |
Family Cites Families (4)
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---|---|---|---|---|
US5515214A (en) * | 1993-04-29 | 1996-05-07 | Nec Corporation | Magnetic disk drive with a filter assembly capable of removing dust and toxic gases |
US5590001A (en) * | 1994-03-15 | 1996-12-31 | Fujitsu Limited | Breather filter unit for magnetic disk drive |
CA2227716A1 (en) * | 1995-05-12 | 1996-11-14 | M.E. Wright | Filter device |
KR19990023033A (en) * | 1995-06-20 | 1999-03-25 | 노르만 시이 린넬/기에르츠 제임스 알 | How to make filters and filters |
-
1999
- 1999-02-10 JP JP11033128A patent/JP2000231775A/en active Pending
-
2000
- 2000-01-06 MY MYPI20000059A patent/MY125096A/en unknown
- 2000-01-12 SG SG200000197A patent/SG83764A1/en unknown
- 2000-01-17 KR KR1020000001929A patent/KR100328909B1/en not_active IP Right Cessation
- 2000-02-09 US US09/501,482 patent/US6683746B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US5417743A (en) * | 1994-01-21 | 1995-05-23 | W. L. Gore & Associates, Inc. | Self-adhesive vent filter and adsorbent assembly with a diffusion tube |
JPH09508061A (en) | 1994-01-21 | 1997-08-19 | ダブリュ.エル.ゴア アンド アソシエイツ,インコーポレイティド | Assembly of self-adhesive vent filter and adsorbent with diffusion tube |
US5997614A (en) * | 1998-07-13 | 1999-12-07 | Donaldson Company, Inc. | Filter with diffusion channel and methods of making and using the filter |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7064920B2 (en) * | 2001-02-13 | 2006-06-20 | Hitachi Global Storage Technologies Netherlands B.V. | Disk drive and breather filter having multiple ventilation paths and method of inspecting same |
US20040114273A1 (en) * | 2001-02-13 | 2004-06-17 | Takayuki Fujiwara | Ventilation path for a disk drive apparatus |
US7209319B1 (en) * | 2004-06-25 | 2007-04-24 | Western Digital Technologies, Inc. | Disk drive having a disk drive component adhered to the disk drive housing via an adhesive assembly having a leveling layer |
EP1796817A2 (en) * | 2004-08-13 | 2007-06-20 | Gore Enterprise Holdings, Inc. | Adsorbent breather filter |
WO2006046996A2 (en) | 2004-08-13 | 2006-05-04 | Gore Enterprise Holdings, Inc. | Grooved active and passive adsorbent filters |
US20060032372A1 (en) * | 2004-08-13 | 2006-02-16 | Dauber Edwin G | Grooved active and passive adsorbent filters |
US20060032371A1 (en) * | 2004-08-13 | 2006-02-16 | Dauber Edwin G | Adsorbent breather filter |
US7291208B2 (en) | 2004-08-13 | 2007-11-06 | Gore Enterprise Holdings, Inc. | Grooved active and passive adsorbent filters |
US7306659B2 (en) | 2004-08-13 | 2007-12-11 | Gore Enterprise Holdings | Adsorbent breather filter |
EP1796817A4 (en) * | 2004-08-13 | 2009-10-28 | Gore Enterprise Holdings Inc | Adsorbent breather filter |
US20060056106A1 (en) * | 2004-09-10 | 2006-03-16 | Hitachi Global Storage Technologies Netherlands B.V. | Moisture absorbing mechanism and magnetic disk drive |
US7630169B2 (en) * | 2004-09-10 | 2009-12-08 | Hitachi Global Storage Technologies Netherlands B.V. | Moisture absorbing mechanism and magnetic disk drive |
US7318859B2 (en) | 2004-10-18 | 2008-01-15 | Gore Enterprise Holdings | Modular adsorbent filters |
US20060092557A1 (en) * | 2004-10-29 | 2006-05-04 | Kabushiki Kaisha Toshiba | Disk device |
US7369356B2 (en) * | 2004-10-29 | 2008-05-06 | Kabushiki Kaisha Toshiba | Disk drive breathing filter including an inner tube within a collecting material storing portion of a permeable envelope |
WO2006084106A1 (en) * | 2005-02-03 | 2006-08-10 | Donaldson Company, Inc. | Breather filter for reduction of contaminant diffusion |
CN101137426B (en) * | 2005-02-03 | 2012-02-22 | 唐纳森公司 | Breather filter for reduction of contaminant diffusion |
US20100086460A1 (en) * | 2005-11-03 | 2010-04-08 | Deeken John S | Device and method for filtering contaminants |
US7811539B2 (en) | 2005-11-03 | 2010-10-12 | Seagate Technology Llc | Device and method for filtering contaminants |
US20070150909A1 (en) * | 2005-12-22 | 2007-06-28 | Takayuki Fujimoto | Disc drive |
US8375994B2 (en) * | 2006-05-09 | 2013-02-19 | Donaldson Company, Inc. | Valve for electronic enclosure |
US20070289971A1 (en) * | 2006-05-09 | 2007-12-20 | Olszewski Jason R | Valve for Electronic Enclosure |
US20120142266A1 (en) * | 2010-12-07 | 2012-06-07 | Empire Technology Development Llc | Ventilator units, methods for providing ventilation in response to humidity levels, and wall units |
US20130044391A1 (en) * | 2011-08-17 | 2013-02-21 | Charles Allan Brown | Magnetic storage device with multi-functional component for controlling chemical and water vapor therein |
US8861127B2 (en) | 2011-08-17 | 2014-10-14 | HGST Netherlands B.V. | Magnetic storage device with dynamic humidity control system to mitigate water vapor transients |
US8867164B2 (en) | 2011-08-17 | 2014-10-21 | HGST Netherlands B.V. | Magnetic storage device with humidity control device incorporating a differentially permeable membrane |
US8885289B2 (en) * | 2011-08-17 | 2014-11-11 | HGST Netherlands B.V. | Magnetic storage device with multi-functional component for controlling chemical and water vapor therein |
US10905991B2 (en) * | 2016-07-20 | 2021-02-02 | W. L. Gore & Associates, Inc. | Adsorbent breather for enclosure protection |
US10388328B1 (en) | 2018-04-06 | 2019-08-20 | Seagate Technology Llc | Storage device breathing structure |
Also Published As
Publication number | Publication date |
---|---|
MY125096A (en) | 2006-07-31 |
JP2000231775A (en) | 2000-08-22 |
SG83764A1 (en) | 2001-10-16 |
KR20000057764A (en) | 2000-09-25 |
KR100328909B1 (en) | 2002-03-15 |
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